How do you keep colour consistent across several printers?
Consistency comes from a closed PDF and a written colour reference, not from forwarding the file on WhatsApp until it is crushed. Do not switch printers halfway through a menu run if you have not kept that reference.
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Ask the printer you trust for the paper name and the profile they used, and store it with the file. The second printer receives a photo of the poster and the red comes out orange. You get a folder with the PDF, the paper and the colour note, the same one you send if another shop prints it one day.